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Signs and SymptomsSigns and Symptoms of the Flu (Influenza)
The flu is an acute illness, meaning that symptoms usually come on suddenly. Infection usually lasts about one week and most patients recover without medical treatment within two weeks. Flu viruses affect the respiratory tract and cause headache, runny or stuffy nose (rhinitis); dry, persistent cough; and sore throat. In some cases, cough associated with the flu can last longer than 2 weeks. Influenza also causes systemic symptoms, including the ...Read the full article
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